Mid-frequency acoustic propagation in shallow water on the New Jersey shelf. II. Intensity fluctuation

The scintillation index and the intensity cumulative distribution function of mid-frequency (2-10 kHz) sound propagation are presented at ranges of 1-9 km in a shallow water channel. The fluctuations are due to water column sound speed variability. It is found that intensity is only correlated over...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2008-09, Vol.124 (3), p.EL91-EL96
Main Authors: DAJUN TANG, HENYEY, Frank S, ZHONGKANG WANG, WILLIAMS, Kevin L, ROUSEFF, Daniel, DAHL, Peter H, QUIJANO, Jorge, JEE WOONG CHOI
Format: Article
Language:English
Subjects:
Acoustics
Atlantic Ocean
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Geologic Sediments
Models, Theoretical
Motion
New Jersey
Physics
Radar
Sound
Sound Spectrography
Time Factors
Underwater sound
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Summary:The scintillation index and the intensity cumulative distribution function of mid-frequency (2-10 kHz) sound propagation are presented at ranges of 1-9 km in a shallow water channel. The fluctuations are due to water column sound speed variability. It is found that intensity is only correlated over a narrow frequency band (50-200 Hz) and the bandwidth is independent of center frequency and range. Furthermore, the intensity probability distribution peaks at zero for all frequencies, and follows an exponential distribution at small values.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.2968295